Citrus Chlorosis Variegated
Mostrando 25-36 de 48 artigos, teses e dissertações.
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25. Análise dos proteomas extracelulares e do acúmulo de moléculas sinais durante o crescimento da Xylella fastidiosa 9a5c in vitro. / Analyses of the extracellular proteomes and accumulation of signal molecules during Xylella fastidiosa 9a5c growth in vitro.
A bactéria Xylella fastidiosa 9a5c é o agente causal da clorose variegada dos citros (CVC) e responsável por grandes perdas econômicas na citricultura. O genoma de X. fastidiosa 9a5c foi totalmente seqüenciado e a sua análise permitiu identificar vários genes possivelmente envolvidos na patogenicidade/virulência da bactéria. Como os sintomas da CVC
Publicado em: 2004
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26. Boron fertilization in pêra rio sweet orange affected by citrus variegated chlorosis. / Adubação boratada em pomar de laranja Pêra Rio afetado pela clorose variegada dos citros.
Citrus crop is extremely dependent on an adequate mineral nutrition to reach bigger levels of production to fewer costs, especially under adverse conditions, as in the case of occurrence of citrus variegated chlorosis (CVC). In this context, boron directly influences the production because it provides a bigger root growth, what increases the volume of the ex
Publicado em: 2003
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27. Production and characterization of gum operon mutants of Xylella fastidiosa cvc strain. / Produção e caracterização de mutantes do operon gum de Xylella fastidiosa.
Xylella fastidiosa is a fastidious, xylem restricted, gram.negative bacteria, that causes several economically important diseases as Pierce s disease of grapevine in USA and the Citrus Variegated Chlorosis (CVC) in Brasil. CVC affects severely the São Paulo State citriculture jeopardizing thousands of jobs and millions of dollars of incomes. The genome sequ
Publicado em: 2003
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28. Infection efficiency and multiplication of citrus [Citrus sinensis (L.) Osbeck] and coffee (Coffea arabica L.) strains of Xylella fastidiosa in cross inoculations. / Eficiência de infecção e multiplicação de estirpes de Xylella fastidiosa de citros [Citrus sinensis (L.) Osbeck] e de cafeeiro (Coffea arabica L.) em inoculações cruzadas.
O trabalho teve por objetivo avaliar a capacidade de infecção e multiplicação de estirpes de Xylella fastidiosa de citros [Citrus sinensis (L.) Osbeck] e de cafeeiro (Coffea arabica L.) em inoculações cruzadas, para investigar a possibilidade de disseminação deste patógeno de pomares cítricos infectados para cafezais ou vice versa. As inoculações
Publicado em: 2003
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29. Xylella fastidiosa - adhesion and colonization in xylem vessels of sweet orange, coffee, plum and tabacco, and insect vectors and formation of biofilme on polystyrene surface. / Xylella fastidiosa adesão e colonização em vasos do xilema de laranjeira doce, cafeeiro, ameixeira, fumo e espécies de cigarrinhas vetoras e formação de biofilme sobre película de poliestireno.
X. fastidiosa is a xylem-limited bacterium that has been affecting a high number of plants in Brazil and in the world. A lot of researches were already accomplished on this bacterium, but little is known regarding the adhesion, colonization and expression of the symptoms in plants. The objectives of this work were: a) through the use of electron microscopy a
Publicado em: 2003
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30. Genomics and X-ray microanalysis indicate that Ca2+ and thiols mediate the aggregation and adhesion of Xylella fastidiosa
The availability of the genome sequence of the bacterial plant pathogen Xylella fastidiosa, the causal agent of citrus variegated chlorosis, is accelerating important investigations concerning its pathogenicity. Plant vessel occlusion is critical for symptom development. The objective of the present study was to search for information that would help to expl
Brazilian Journal of Medical and Biological Research. Publicado em: 2002-06
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31. Epidemiology of citrus variegated chlorosis in state of São Paulo. / Epidemiologia da clorose variegada dos citros no Estado de São Paulo.
This work aimed to evaluate the progress and spatial pattern of Citrus Variegated Chlorosis (CVC) in three regions in the state of São Paulo, Brazil. By bimonthly visual assessments three Pêra sweet orange/ Rangpur lime orchards in three regions (Northwest, Center and South) were mapped from july 1998 to december 2000. Progress was evaluated by fitting nin
Publicado em: 2002
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32. Uso do DRIS na avaliação do estado nutricional de plantas cítricas afetadas pela clorose variegada dos citros. / Use of DRIS to evaluate nutritional status of citric plants affected by citrus variegated chlorosis.
Among all factors which affect the yield and fruit quality from citric plants, pests and diseases are of outstanding importance. There are several pests and diseases wich affect the citrus crop. The citrus variegated chlorosis (CVC) is one of the most severe and destructive diseases affecting both yield and quality. Because this disease is caused by a xylem
Publicado em: 2002
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33. Analysis of the intercellular fluid proteome of Xylella fastidiosa - infected citrus leaves. / Análise do proteoma do fluído intercelular de folhas de laranjeiras infectadas com Xylella fastidiosa.
In order to understand the mechanisms regulating the Xylella fastidiosacitrus (Citrus sinensis var. Pêra) interaction, proteins with differential accumulation in the apoplast of Xf-infected citrus leaves with or without disease symptoms as compared to non-infected leaves, were identified and characterized using 2D-PAGE and mass spectrometry (MALDI-ToF). The
Publicado em: 2002
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34. Influência da temperatura na fotossíntese de laranjeira Pêra com clorose variegada dos citros. / Influence of temperature on photosynthesis of sweet orange Pêra with citrus variegated chlorosis.
A clorose variegada dos citros (CVC) é um dos principais problemas que assolam a citricultura brasileira nos últimos dez anos. Essa doença, causada pela bactéria Xylella fastidiosa, determina menor produção das plantas infectadas e tem estreita relação com as condições climáticas, sendo sua severidade agravada em regiões com baixa disponibilidade
Publicado em: 2002
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35. Cadeias inovativas, redes de inovação e a dinamica tecnologica da citricultura no Estado de São Paulo
This Dissertartion undertakes a characterization of research institutional arrangements established in the citriculture agri-chain in Sao Paulo State, through an analysis of the process which established a new technical basis to the production of citrus nursery trees, in order to prevent the negative effects from Citrus Variegated Chlorosis in Sao Paulo s or
Publicado em: 2002
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36. Avaliação de genes diferencialmente expressos em Xylella fastidiosa em condições de adesão
Xy/ella fastidiosa is a gram-negative and xylem-limited bacterium, which is the causal agent of diseases of several important crops, such as the Citrus Variegated Chlorosis in Brazil and the Pierce s disease in grapevine. Due the colonization in environment under high pressure, it is believed that the bacterium presents mechanisms of aggregation among the ce
Publicado em: 2002